Improvement in governors



Governor.

Patented April 20, 1875.

/2-21/6'2? fo r, f

THEGRAPHIG C0.PHOT0LITH.39&41 PARK PLAGE, N. Y.

ENIT-ED STATES @ATENE QFFICE.

DANIEL L. F. CHASE, OF SOMERVILLE, vASSIGNOR OF ONE-HALF HIS RIGHT TO LEWSON E. CHASE, OF WATERTOWN, MASSACHUSETTS.

IMPRVEMENT IN GOVERNORS.

Specification forming part of Letters Patent No. 162,219, dated April 20, 1875; application led April 1, 1875.

To all whom it may concern:

Be it known that I, DANIEL L. F. CHASE, of Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Steam-Governors 5 and I hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and the letters of reference marked thereon.

The object of my invention is to increase the sensitiveness of the stearngovernor by dispensing with steam-packed valve-stems, and thus avoiding the friction consequent on the use thereof, and also avoiding the following difficulty: In the centrifugal governor, as commonly constructed, with valve-stem and stuffing-box, the valve-stem is press'ed'out Ward from the stuffing-box by a force proportional to the area of its section, and to the pressure of steam in the boiler, and as such pressure varies, a variable force is exerted on the stem, Which partiallyT neutralizes the centrifugal action ofthe balls or Weights.

The nature of inyinvention consists in inelosin g the centrifugal mechanism of the governor, as Well as the valve, in 011e andthe Figure l of the drawings is a vertical section through the middle ofthe machine. Fig. 2 is a horizontal section ou the line y.

The case A is of a spherical or other suitable forni, and has an inlet steam-passage at C. A stationary tube, B, projects upward from the bottom of the case, Within the same, the hollow of the tube being continued through the base-flange of the machine. The tube B is closed at the top, but has holes O O O through its sides, these holes being the valveports of the governor. The steam, then, entering the case at C, passes through the ports C, and thence out throughA the tube B. S is the drivingshaft, driven by the pulley P. To the lower end of the shaft S is fixed a flexible ring, E E E E, of steel or other elastic metal, and to the sides of said ring are attached balls or Weights D D. The lower part of the ring is attached to a sleeve or valve, V, which slides on the tube B. The valve V, when in its lowest position, leaves the ports O open, but When moved upward on the tube it covers and closes the same.

The ring E and the balls D D revolve in connection with the shaft S, and when the balls ily outward by centrifugal force the ring becomes elliptical, its vertical diameter being shortened, and consequently the valve V is drawn upward by the ring, so as to close the ports either partially or entirely, according to the varying speed.

Instead of the elastic ring described, rigid arms, corresponding to the four parts E E E E of the ring, might be used, the same being' suitably jointed to the shaft, balls, and valve. lu that case the balls inignt be drawn back by gravity or springs, or both.

The particular form of valve described is not essential, as various forms of balanced valves in common use Would serve the same purpose.

I claim no novelty in the form of valves or valve-ports.

rIhe combination of the case A, the shaft S, the spring E E E E, the balls D D, the valve V, and the tube B, With its ports O, the Whole being arranged substantially as described, and for the purposes explained.

DANIEL L. F. CHASE.

Witnesses:

LiravsoivV E. CHASE, F. L, BAILEY. 

